Nominal tensile strength reduction and its mechanism of ultra-high performance concrete with steel bar reinforcements

被引：3
|
作者：
Bian, Chen [1 ,2 ,3 ]
Guo, Junyuan [1 ]
Wang, Junyan [1 ]
Xiao, Jianzhuang [1 ,2 ]
机构：
[1] Tongji Univ, Key Lab Adv Civil Engn Mat, Minist Educ, Shanghai 201804, Peoples R China
[2] Tongji Univ, Coll Civil Engn, Shanghai 200092, Peoples R China
[3] Zhejiang Inst Commun Co Ltd, Hangzhou, Peoples R China
来源：
JOURNAL OF BUILDING ENGINEERING | 2023年 / 65卷
基金：
中国博士后科学基金;
关键词：
Ultra -high performance concrete (UHPC); Reinforcement detail; Nominal tensile strength; Restrained shrinkage; Localized damage aggravation; AUTOGENOUS SHRINKAGE STRESS; BEHAVIOR; CRACKING;
D O I：
10.1016/j.jobe.2022.105778
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A comprehensive experimental study was designed to investigate the tensile response of four series of ultra-high performance concrete (UHPC) with different steel bars. The changing rule of the nominal tensile strength of UHPC in reinforced UHPC with respect to reinforcement details was revealed and the relative mechanism was clarified to both make adequate capacity calculation for structural design and develop the refined material model for finite-element analysis. Polynomial fitting formulas to account for the nominal tensile strength reduction of UHPC with steel bar ratios of 1.57-6.28% were proposed. UHPC nominal elastic tensile strength reduction in reinforced UHPC was found linearly dependent on the restrained degree of steel bars on UHPC shrinkage based on theoretical analysis. The further nominal ultimate tensile strength reduction of strain hardening UHPC in reinforced UHPC was verified to be attributed to the localized damage aggravation around the ribs of the deformed steel bar based on acoustic emission parametric analysis.
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收藏
页数：18
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